It's because Westerners want to believe those are the top paying jobs in China. If China loses that then China collapses which is what they wish were true so they can use it as leverage against China. One reason why China is getting more expensive for outsourcers is because they have to pay more to workers to compete with domestic companies that are paying more so they ain't the top paying jobs in China like they believe.
They think Apple is God’s gift to China. That without Apple somehow China is finished as a manufacturing power. Huawei was destroying Apple before they put chip sanctions on Huawei.